improvements-2.x-dev/modules/improvements_contact/improvements_contact.links.task.yml

entity.contact_form.canonical:
  title: 'View'
  route_name: entity.contact_form.canonical
  base_route: entity.contact_form.edit_form
  weight: -100

entity.contact_form.messages:
  deriver: \Drupal\improvements_contact\Plugin\Derivative\ContactFormMessagesLocalTaskDeriver